1、IP - , DOD-I-63274A 53 W 9999906 01090b3 4 . pOP-03 DOD-I-63274A 14 February 1983 SUPERSEDING DOD-1-63274 26 September 1977 - - - - - - MILITARY SPECIFICATION INSERT, SCREW THREAD- THIN WALL, LOCKED IN, METRIC, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and A
2、gencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers metric thin wall, locked in, screw thread inserts with and without metallic internal thread locking feature. 2. APPLICABLE DOWMENTS 2.1 Government documents,. 2.1.1 Specifications, standards, and handbooks. Unless ot
3、herwise specified, the following specifications, standards, and handbooks of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation, form a part of this specification to the extent specified herein. . SPECIFICATIONS FE
4、DERAL QQ-A-225/6 - Aluminum Alloy Ear, Rod and Wire; Rolled, Drawn or Cold QQ-A-250/6 - Aluminum Alloy 5083, Plate and Sheet QQ-P-416 - Plating, Cadmium (Electrodeposited) PPP-H-1581 - Hardware (Fasteners and Related Items), Packaging Of Finished, 2024 -_- Beneficial comments (recommendations, addit
5、ions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, US Army kmanent Research and Development Command, ATTN: DRDAR- TST-S, Dover, NJ 07801 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) app
6、earing at the end of this document or by letter. FSC 5340 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- DOD-I-6327LIA 53 779790b OL07ObLI b W DOD-I-63274A MILITARY MIL-1-6866 - Inspection, Penetrant Method Of MIL-1-68 68 - Inspection Process, Magn
7、etic -Particle MIL-A-8625 - Anodic Coatings, for Aluminum and Aluminum Alloys MIL-L-8937 - Lubricant , Solid Film, Heat Cured, Corrosion Inhibiting MIL-I-63274/1 - Insert , Screw Thread-Thin !$all, Locked In, Metric STANDARDS FEDERAL FED-STD-828/20 - FED-S“D-H28/21 - Screw Thread Standards for Feder
8、al Services, Section 21, Inspectlon Methods for Acceptability of UIJ, N3, UNJ, 14 and 14.J Screw - Threads Metric Screw Threads MILITARY MIL-STD-105 - Sampling Frocedures and Tables for Inspection by Attributes MIL-STD-1312 - Fasteners Test Methods (Copies of specifications, standards, handbooks, dr
9、awings, and publication re- quired by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer). 2.2 Other publications. to the extent specified herein. DoD adopted shall be the issue listed in the curr
10、ent DoDISS and the supplement there- to, if applicable. The following documents form a part of this specification The issues of the documents which are indicated as MRICA? NATIONAL STANDARDS INSTITUTE (ANSI) ANSI B46.1 - Surface Te.xture (Application for copies should be addressed to the American Na
11、tional Standards Institute, 1430 Broadway, New York, NY 10018.) AEROSPACE MATERIAL SPECIFICATIONS (MS) AMs 2411 - Silver Plating For High Temperature Applications ANS 5643 - Steel Bars, Forgings, Tubing and Rings, Corrosion Resistant AFS 5731 - Steel Bars, Forgings, Tubing the removal cycle shall be
12、 considered complete when the locking feature is disengaged. Bolts and screws shall be in accordance with 4.1.3.2 and shall have A new bolt or screw and a new sample in2 4.7.2.1 Maximum locking torque test. maximum torque value encountered on any installation or removal cycle and shall not exceed th
13、e applicable values specified in Table I in accordance with the requirement of 3.4.2.1. Maximum locking torque shall be the 4.7.2.2 Minimum breakaway torque test. minimum torque required to start removal of the bolt or screw from a fixed position located between the first 1/4 turn to 1 turn of the r
14、emoval cycle. imum breakaway torque readings shall be recorded at the start of the first, seventh, and fifteenth removal cycles. The torque for any cycle shall not be less than the applicable values specified in Table I in accordance with the requirements of 3.4.2.1. Minhum breakaway torque shall be
15、 the Min- 4.7.3 Tensile strength test. Sample inserts shall be installed in test blocks in accordance with figure 1 and 4.1.3. freely into the insert with finger torque prior to engaging the locking feature. The bolt or screw thread shall be of sufficient length to fully engage the entire length of
16、the insert internal thread when the sample inserts are installed in test fixture in accordance with figure 2. The applicable tensile strength value specified in Table II shall 5e applied to the assembly and sample inserts shall meet the requirements of 3.7.2. In the event of bolt or screw failure be
17、low specified tensile strength value, the test shall be repeated until the tensile strength value of the insert is reached or exceeded. Rate of loading shall not exceed 700 MPa per minute based on the shank diameter area of the bolt or screw. The test bolt or screw shall assemble 4.7.4 Resistance to
18、 pullout test. Sample inserts shall be installed in test blocks in accordance with figure 1 and 4.l.3. The minimum single shear strength of the test block material shall be determined by means of double shear tests on coupons taken from the material from which the test blocks are fabricated. The pro
19、cedure shall be the same as specified in 4.7.3 except, to demonstrate the average shear engagement area , an axial load of sufficient magnitude to produce failure (pullout) shall be applied to the assembly. The axial load test result shall be adjusted for test block shear strength as follows: The pr
20、oduct of the load test results (N) and the ratio of the 170 MPa to the actual minimum shear . I r i. 14 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-I-63274A 53 7777706 0307077 4 DOD-1-632 74A Bushingclearance - Bolt nominal dia plus O. 25mm
21、IO. 13 Bushing, II I Free fit dia 1.5 x Nom insert Tm1 Lok, 1.5mm ekt thd dia 20.4mm L Lower Yoke Test Block Free fit spacer diametral clearance thd dia 20.4mm on ID & OD. 1.5 x Nom insert ext FIGURE 2. Tensile strength and resistance to pullout test fixtures. 15 Provided by IHSNot for ResaleNo repr
22、oduction or networking permitted without license from IHS-,-,-DOD - 1 - 6 3 2 7 4A Torque Wrench ( C 1 oc kw i se) Socket Wrench Test 1lNIl bolt gap Bushing cbore dia than major dia of insert O 13mm larger ext thread of Insert Test Block Forward Side NOTE: Above test fixture used with insert in the
23、as received condition. OPTIONAL TESTING METHOD Insert Manufacturers Installat ion Wrench Insert (Broached) -Test Block NOTE: Above test fixture used when product is internally broached with a two or three-slot recess whose cross pint dimension does not exceed the major diameter of the insert interna
24、l thread. More accurate results are obtainable with this method as the insert will not tend to collapse or transmit friction into final values. FIGURE 3. Rotational resistance test fixture Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-I-6327YA
25、53 W 7777706 0307077 DOD-I-63274A .strength shall be used as the resistance to pullout (N). The mean (arith- metical average) value, as determined by five or more tests, shall meet or exceed the values specified in Table III in accordance with 3.7.3. In the event of bolt or screw failure below the a
26、pplicable strength rating, the test shall be repeated until the pullout strength of the insert is reached or exceeded. Rate of loading shall not exceed 700 MPa per minute based on the shank diameter area of the bolt or screw. Whenever the pullout values exceed the tensile strength of the test bolt o
27、r screw, or the test loads exceed the capabilities of the test equipment, it is permissable to use lower shear strength materials (100 MFa approx.) in lieu of specified test block materials. Double shear tests on coupons taken from the lower shear strength test blocks shall be performed and the resu
28、ltant shear strength used to adjust the test results as stated above. 4.7.5 Rotational resistance test. Sample inserts shall be installed in test blocks in accordance with figure 1 and 4.1.3 and utilizing a test assembly as illustrated in figure 3. With the forward side face of the insert installed
29、in accordance with 4.1.3, the far side of the insert shall extend a distance approximately 1.6mm past the far side of the test block allowing it to fit into the counterbore of the bushing. The insert shall fit into the bushing counterbore sufficiently close to prevent it from expanding under pressur
30、e. A test bolt or screw shall enter the insert from the back side (opposite normal entry). Failure at applicable values.below those specified in Table IV in accordance with the requirements of 3.7.4 shall be cause for rejection. The test bolt or screw shall be torqued in a clockwise direction. 5. PA
31、CKAGING 5.1 Packaging requirements. The requirements for packaging shall be in accordance with PPP-H-1581 (See 6.2). 6. NOTES 6.1 Intended use. use as a general purpose, locked in, metric fastener, with or without an internal metallic locking feature to resist rotation of a bolt or screw. Inserts co
32、vered by this specification are intended for 6.2 Ordering data. Acquisition documents should specify the following: a. Title, number and date of this specification and the applicable specification sheet. b. Applicable specification sheet part number (See 3.1). c. Level (degree). of protection, in ac
33、cordance with PPP-H-1581, ordering data (See 5.1.). 6.3 Definitions. 6.3.1 Crack. the grain or grain boundary without the inclusion of foreign elements. A crack is defined as a clean crystalline break passing through i7 .- Provided by IHSNot for ResaleNo reproduction or networking permitted without
34、license from IHS-,-,-DOD-I-6327qA 53 W 7777706 OLO7OO q DOD-I-53274A 6.3.2 Lap. fins or sharp corners, and then rolling or forging, but not welding them into surf ace. A surface defect appearing as a seam caused by folding over metal, 6.3.3 Seam. An elongated discontinuity caused by a defect, which
35、has been closed by rolling or forging mechanically, but not united. 6.3.4 Inclusions. Particles of nonmetallic impurities such as oxides, sulfides and silicates, which are mechanically held in the steel during solidification. - 6.4 Changes from previous issue. Asterisks are not used in this revision
36、 to identify changes with respect to the previous issue due to extensiveness of the changes. Custodians: . Army - AR. Navy - OS Air Force - 99 Review activities: Army - AV, MI Air Force - 11 DLA - IS User activities: Army - ME, AT, CR Navy - MC Preparing activity: Amy - AR (Project 5340-1461) . V.S. GOVERNMENT PRINTING OFFICE: 1983-605-034/1701 . 18 _Li_. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
